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function dispatchWheelEvent(element, deltaX, deltaY)
{
var eventInit = { deltaX: -deltaX, deltaY: -deltaY };
var event = new WheelEvent('mousewheel', eventInit);
element.dispatchEvent(event);
}
var input;
function testWheelEvent(parameters)
{
var inputType = parameters['inputType'];
var initialValue = parameters['initialValue'];
var stepUpValue1 = parameters['stepUpValue1'];
var stepUpValue2 = parameters['stepUpValue2'];
description('Test for wheel operations for <input type=' + inputType + '>');
var parent = document.createElement('div');
document.body.appendChild(parent);
parent.innerHTML = '<input type=' + inputType + ' id=test value="' + initialValue + '"> <input id=another>';
input = document.getElementById('test');
input.focus();
debug('Initial value is ' + initialValue + '. We\'ll wheel up by 1:');
dispatchWheelEvent(input, 0, 1);
shouldBeEqualToString('input.value', stepUpValue1);
debug('Wheel up by 100:');
dispatchWheelEvent(input, 0, 100);
shouldBeEqualToString('input.value', stepUpValue2);
debug('Wheel down by 1:');
dispatchWheelEvent(input, 0, -1);
shouldBeEqualToString('input.value', stepUpValue1);
debug('Wheel down by 256:');
dispatchWheelEvent(input, 0, -256);
shouldBeEqualToString('input.value', initialValue);
debug('Disabled input element:');
input.disabled = true;
dispatchWheelEvent(input, 0, 1);
shouldBeEqualToString('input.value', initialValue);
input.removeAttribute('disabled');
debug('Read-only input element:');
input.readOnly = true;
dispatchWheelEvent(input, 0, 1);
shouldBeEqualToString('input.value', initialValue);
input.readOnly = false;
debug('No focus:');
document.getElementById('another').focus();
dispatchWheelEvent(input, 0, 1);
shouldBeEqualToString('input.value', initialValue);
parent.parentNode.removeChild(parent);
}
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